Stop guessing which
OBD2 scanner to buy.

It plugs into your car's diagnostic port and reads the trouble codes stored by the engine computer, so you know why the check engine light came on before you pay a shop to look.

We buy every unit ourselves, connect it to a bench of real vehicles across different makes, and score read/clear accuracy, live data, bidirectional support, app quality and build quality before publishing a verdict.

Most cars built after 1996 support standard OBD2 codes that any compliant scanner can read, but advanced features like bidirectional tests or ABS/airbag modules often need a higher-end or brand-specific tool - check our compatibility notes per review.

We test every scanner ourselves on real vehicles instead of summarizing other people's star ratings, and we disclose exactly which cars and faults we tested against in each review.

No - clearing a code only resets the warning light. If the underlying issue isn't repaired, the code (and the light) will usually come back within a few drive cycles.